Figure out what your audience truly wants to learn from your speech; know their interest, knowledge level, and their expectation from your speech. Accordingly, use an appropriate tone.
Confidence builds automatically when you make yourself perfect with the task. Practice giving the speech in front of the mirror, recording yourself, and understanding your progress, working on the pace and intonation of your voice.
To engage the audience with your speech, make eye contact with people present in the room and hold it for a few seconds each. This will also build your rapport and your confidence while delivering your speech.
What if, while delivering your speech, you forget the line? To avoid this situation, structure your speech rather than memorising it; divide it into three sections: introduction, body, and conclusion as a guideline.
To make the speech interesting for your audience, do some tasks or play a brief activity. This will help in the active participation of your audience and involve them throughout the speech.
Deliver your speech slowly; don't rush so that your audience can engage with every line you speak. Use pauses to clarify the points.
To add visual representation of your speech, use hand gestures and facial reactions to emphasize your points and to convey emotions. Avoid fidgeting or a stiff posture.
When you address audience concerns in your speech, it makes the speech more interesting and interactive. Also, anticipate potential questions and have thoughtful responses ready.